Charles k



No. 6|3,423. Patented Nov. l, |898.

C. K. PICKYLES. STEP-OVER cAn SEAT.

(Application filed Dec. 13,1897.)

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Nrrnn STATES A'rnNT muon.

CHARLES K. PIOKLES, OF ST. LOUIS, MISSOURI, ASSIGNOR TO SAMUEL M. DODD, OF SAME PLACE.

STEP-OVER CAR-S EAT.

SPECIFICATION forming part of Letters Patent No. 613,423, dated November 1, 1898.

Application filed December 13,1897. Serial No. 661,722. (No model.)

To a/ZZ whom t may concern:

Be it known that I, CHARLES K. PIoKLns, a citizen of the United States, residing at St.

Louis, in the State of Missouri, have invented certain new and useful Improvements in Step- Over Oar-Seats; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had tol the accompanying drawings, forming apart of this specification.

The present invention relates to car-seats, and more especially to that type of car-seats in which the seat-back has a step-over movement in its reversal action over the seat por# tion, While said seat portion has a movement in unison with the seat-back, but in an opposite direction, to afford in each position full seating capacity and a proper slope of the seat with relation to the back, an example of which may be found in'my former application for Letters Patent, Serial No. 655,815, filed October 20, 1897.

The objects of the present improvements are to provide a simple, durable, and effective connecting mechanism between the seat or chair parts, whereby the shifting movement that is imparted to the seat proper is amplified to an extentthat will expose for effective use the full width of the seat from front to back and with which the relative movements of the parts are attained in a certain and positive manner, as will hereinafter more fully appear. I attain such objects by the construction illustrated in the accompanying drawings, in which- Figure 1 is an end elevation of a step-over car-seat embodying the present invention,

one position of the step -over back being shown in full lines and the 'other position in dotted lines; Fig. 2', a detaillongitudinalsection at line cc @Figs 3 and 6; Figs. 3 and 4, detail sectional elevations at lines fc and m2 m2, Fig. 6; Fig. 5, a side view of one of the shaft-hangers of the intermediate gearinglin a detached condition; Fig. 6, a detail plan view of the mechanism atone end of the carseat, the back-arms being shown in section at line x3 w3, Fig. 3. l

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents the seat portion, of any usual construction and provided at each end with end plates 2, each of said plates being formed with a horizontal toothed rack 3, preferably of a rectilinear form, and with a horizontal supporting slot or recess 4, preferably of a curved or segmental nature, as shown.

The chair base or support will be of any usual and approved construction and in the ypresent invention will be provided with end plates 5, each of which,- is provided with a toothed `rack 6, preferably of a curved or segmentalV nature, with a horizontal conning slot or recess 7, preferably of a curved nature and concentric with the toothed rack 6, and with supporting projections or studs 8, that have engagement in the supporting slot or recess of the seat-plate 2 to support and limit the seat in its shifting movement. Such shifting movement of the seat portion is a combined sliding and tilting movement in a directionopposite to that in which the seatback 9 has movement. The amount of such tilting movement of the seat will depend upon the amount of curvature given to the supporting slot or recess 4.- in the end plate 'of the seat portion, so that by modifying the form of said slot or recess a corresponding change Will be made in the movement of such seat portion.

9'is the step-over seat-back, preferably of the straight form shown, and finished or upholstered on both side'sor surfaces.

10 are the supportingarms of the seatback 9 and which, as in my -aforesaid prior application, may be of a substantially counterpart formation, with their upper ends having pivotal connection with the arms of across-head 11, attached to the respective ends of the seat-back 9, as shown, while their lower ends are provided with guide studs or projections 12 andwith sector-shaped ends 13, concen`V tric with the guide studs or projections 12 and preferably of a toothed nature, as shown, and adapted to engage and move upon the corre-l spondingly-formed track on toothed rack 6 on the end plate of the chair standard or base in a manner similar tothe construction as shown and claimed in my aforesaid prior-aptoo plication, the engagement of the parts being such that the lower ends of the back-supporting arms will move in the same direction as the upper ends thereof, so that the arms may be of a shorter nature than the arms heretofore employed in the present class of stepover ear-seats.

In the present improvement the slidingr movement of the seat portion 1 in a direction opposite to that of the seat-back, as heretofore described, is attained in an indirect manner by the following mechanism:

14 is a shaft-hanger formed with eyes ororiflces 15 at each end, that have engagement with the studs or projections 12 on the supporting-arms 10 of the seat-back and with an intermediate orifice 16, that forms a bearing for the shaft 1'7, extending from end to end of the seat and supported at the end by a counterpart arrangement. 18 are pinions at the respective ends of said shaft, that have engagement with the respective toothed sector-shaped ends 13 of the back-supporting arms 10 to receive motion therefrom and at the same time connect the same together, so as to move in unison in a positive manner. 19 are gear-wheels of a larger diameter than the pinions 18, also secured to the respective ends of the shaft 17 and adapted to engage with the toothed racks 3 upon the seat portion l. With this construction the shaft 17, with its gear-wheels and pinions 19 and 18, moves from side to side with the sector-shaped ends of the supporting-arms 10 in a reversal of the car-seat, and the dierence in the relative diameters of the pinions 18 and gearwheel 19 governs the amount of shifting movement imparted to the seat portion 1, so that by a relative change in such diameters a corresponding change can be attained in the amount of the shifting movement of said seat portion 1.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a step-over car-seat, the combination of a base or standard, provided with a track, a shifting seat portion, a step-over back, means for supporting said back comprising concurrently-moving arms at each end of the seat adapted to bear and have rolling movement from side to side upon the track of the standard, means whereby the lower ends of said arms are caused to travel in the same direction as the upper ends thereof, and means actuated by the movement of the back-supporting arms and adapted to shift the seat portion in a direction opposite to the movement of the back, substantially as set forth.

2. In a step-over car-seat, the combination of a base or standard provided with a toothed track, a shifting seat portion a seat-back, back-supporting arms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said track, means whereby the lower ends of said arms are caused to travel in the same direction as the upper ends thereof, and an intermediate mechanism between the back supporting arms and the seat portion for imparting to the seat portion a shifting movement in a direction opposite to the travel of the back, substantially as set forth.

3. In a step-over car-seat, the combination of a base or standard provided with a toothed track of a segmental form, a shifting seat portion, a seat-back, back-supporting arms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said tracks, means whereby the lower ends of said arms are caused to travel in the same direction as the upper ends thereof, and an intermediate mechanism between the backsupporting arms and the seat portion for imparting to the seat portion a shifting movement in a direction opposite to the travel of the back, substantially as set forth.

4. In astep-over car-seat, the combination of a supporting base or standard provided with a toothed track, a shifting seat portion, a seat-back,backarms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said back, and an intermediate mechanism between the backarms and the seat portion for imparting to the seat portion a shifting movement in a direction opposite to the travel of the back-arms the same comprising an intermediate pinion gearing with the toothed sector ends of the arms, a gear-Wheel turning with said pinion, and a rack upon the seat portion engaging said gear-wheel, substantially as set forth.

5. In a step-over car-seat, the combination of a supporting base or standard provided with a toothed track, a shifting seat portion, aseat-baclc,backa1ms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said track, and an intermediate mechanism between the backarms and the seat portion for imparting to the seat portion a shifting movement in adirection opposite to the travel of the back-arms the same comprising an intermediate pinion gearing with the toothed sector ends of the arms, a gear-wheel turning with said pinion, a rack upon the seat portion engaging said gear-wheel, and a longitudinallyarranged shaft carrying said gear and pinion, substantially as set forth.

6. In a step-over car-seat, the combination of a supporting base or standard provided with a toothed track, a shifting seat portion, a seat-back,baekarms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said track, and an intermediate pinion gearing with the toothed sector ends of the back-arms, substantially as set forth.

7. In a step-over car-seat, the combination of a supporting base or standard provided with toothed tracks, a shifting seat portion, a seat-back,back-arms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said tracks, interme- IIO diate pinions gearing with the toothed sector ends of the back-arms at the respective ends of the car-seat, and a longitudinally-arranged shaft carrying said pinions, substantially as Set forth. n

8. In a step-over car-seat, the combination of a supporting base or standard provided with a toothed track, a shifting seatlportion, a seat-back, back-arms provided with toothed sector-shaped ends adapted to travel from one side to the other upon said track, an intermediate pinion gearing With the toothed sector ends of the back-arms, and a hanger for said pinion, connected to said arms by studs that are concentric With the sector ends thereof substantially as set forth.

9. ln a step-over car-seat, the combination of a supporting base or standard provided With toothed tracks, a shifting seat portion, a seat-back, back-arms provided with toothed sectorshaped en ds adapted to travel from one side to the other upon said tracks, intermediate pinions gearing With the toothed sector ends of the back-arms at the respective ends of the car-seats, a longitudinally-arranged shaft carrying said pinions, and hangers for said shaft connected to the back-arms by studs that are concentric With the sector ends thereof, substantially as set forth.

lO. In a step-over car-seat, the combination of a supporting base or standard provided with supporting studs or projections,-a shifting seat portion provided with horizontal supporting slots or recesses engaging the supporting studs or projections on the seat-standard, a seat-back, and means for imparting mo 'with supporting studs or projections, a shifting seat portion provided With horizontal supporting slots or recesses of a segmental nature engaging the supporting studs or projections on the seat-standards, a seat-back,

Aback-arms provided with toothed sectorshaped ends adapted to travel from one side to the other, a toothed track upon the standard upon which the arm ends travel, an intermediate pinion gearing with the toothed sector ends of the arms, a gear-Wheel turning with said pinion, and a rack upon the seat portion engaging said gear-Wheel, substan-4 tially as set forth.

In testimony whereof Witness my hand this 11th day of December, 1897.

CHARLES K. PICKLES. In presence of- ROBERT BURNS, G. A. PENNINGTON. 

